⚡ CPT 95870 — Needle Electromyography; Limited Study Of Muscles In 1 Extremity Or Non-Limb (Axial) Muscles (Unilateral Or Bilateral), Other Than Thoracic Paraspinal, Cranial Nerve Supplied Muscles, Or Sphincters¹
Quick Reference
wRVU: 0.60² | Global Period: **000**² | Assistant Payable: No² | Bilateral Indicator: 0²
Rule: CPT 95870 is subject to a PC/TC split, meaning modifiers -26 (professional) and -TC (technical) apply when services are divided.² The bilateral indicator is 0 because the descriptor explicitly states “unilateral or bilateral,” making it inappropriate to append modifier -50 for axial muscles.¹²
📋 Clinical Description
CPT 95870 describes a limited needle electromyography (EMG) study where the provider inserts a needle electrode into specific muscles of one extremity (arm or leg) or non-limb (axial) muscles, such as the abdominal wall or intercostals.¹ The procedure records the electrical activity of the muscle during rest and voluntary contraction to detect denervation, myopathy, or reinnervation. This code is utilized when the examination is confined to fewer than five muscles in an extremity, or when sampling specific non-paraspinal axial muscles, rather than performing a comprehensive study of an entire limb.¹³
During the study, the provider evaluates insertional activity, spontaneous activity at rest, and the morphology of motor unit action potentials (MUAPs) during muscle contraction.¹ CPT 95870 is distinguished from sibling codes like 95860 (one full extremity, five or more muscles) and 95869 (thoracic paraspinal muscles).¹ Providers rely on this limited study to target specific areas of focal weakness or to answer a narrow clinical question, such as isolating a mononeuropathy or evaluating a single root lesion without needing a full limb assessment.¹³
This procedure may be performed in the following clinical contexts:
- Evaluating a localized mononeuropathy, such as a targeted assessment of the median nerve in carpal tunnel syndrome, where a comprehensive limb EMG is unnecessary.¹
- Testing non-limb axial muscles, such as the abdominal wall or intercostal muscles, to evaluate for focal radiculopathy, plexopathy, or structural muscle disease.¹³
- Assessing fewer than five specific muscles in a single extremity to monitor recovery from a previously diagnosed peripheral nerve injury.³
- Guiding precise clinical diagnoses in scenarios where only one specific region shows symptoms of denervation and comprehensive testing is not clinically indicated.³
🔬 Anatomical & Procedural Considerations
| Variant | Mechanism | Key Notes |
|---|---|---|
| Upper Extremity Limited | Needle electrodes are inserted into fewer than five specific muscles in the arm or hand (e.g., abductor pollicis brevis, flexor carpi radialis). The electrical waveforms are analyzed via an oscilloscope and audio speaker.¹ | Ideal for localized entrapment neuropathies. Do not use this if five or more muscles are tested in the same extremity; upgrade to 95860.¹³ |
| Lower Extremity Limited | Targeted sampling of lower limb muscles (e.g., tibialis anterior, medial gastrocnemius) using concentric or monopolar needles to record motor unit action potentials.¹ | Useful for isolating a focal peroneal or tibial nerve issue. Cannot be billed alongside comprehensive extremity codes for the same limb.³ |
| Axial (Non-Limb) Muscles | The provider tests unilateral or bilateral non-paraspinal axial muscles, such as the rectus abdominis or intercostals, checking for spontaneous and insertional activity.¹ | Thoracic paraspinal muscles are explicitly excluded and should be coded using 95869.¹ The descriptor accounts for unilateral or bilateral testing, so -50 is invalid.² |
Clinical Pearl
CPT 95870 is strictly a “limited” study, meaning it covers fewer than five muscles in an extremity.¹ If the provider tests five or more muscles innervated by three or more nerves or four or more spinal levels in a single extremity, you must report the comprehensive CPT 95860 instead.¹³ Always ensure the documentation explicitly names the muscles tested to support the limited vs. comprehensive distinction.³
✅ Procedure Includes
- Needle insertion into the targeted specific muscles of one extremity or axial region.¹
- Real-time observation and recording of electrical activity during both muscle rest and voluntary contraction.¹
- Analysis of insertional activity, fibrillation potentials, positive sharp waves, and fasciculations.¹
- Evaluation of motor unit action potential (MUAP) morphology, amplitude, duration, and recruitment patterns.¹
- Immediate interpretation of the audio and visual oscilloscope findings by the performing provider.¹
- Generation of a final formal report detailing the findings, interpretation, and clinical correlation.³
❌ Excludes / Do Not Report Together
| Code | Description | Relationship |
|---|---|---|
| 95860 | Needle EMG, 1 extremity | CPT 95870 should not be billed with comprehensive extremity codes for the same limb. Use 95860 if the study includes 5+ muscles.¹³ |
| 95869 | Needle EMG, thoracic paraspinal | Thoracic paraspinal muscles are explicitly excluded from the descriptor of 95870.¹ |
| 95872 | Needle EMG, single fiber | Single fiber EMG is a distinct, highly specialized quantitative study and should not be confused with standard limited needle EMG.¹ |
| 95885 | Needle EMG, limited, done with NCS | If the limited EMG is performed on the same day as a nerve conduction study (NCS), use the add-on code 95885 instead of the standalone 95870.¹³ |
Bundling Alert
CPT 95870 is heavily scrutinized for unbundling, especially when Nerve Conduction Studies (NCS) are performed concurrently. If NCS is performed on the same day, you must not use standalone 95870; instead, you must report the add-on code 95885.¹³ Additionally, billing 95870 alongside comprehensive EMG codes (e.g., 95860-95864) for the same extremity will trigger an NCCI edit and lead to denial.³
🌳 Code Tree — Medicine
CPT 90281-99607 Medicine
│
├── 95860-95999 Neurology and Neuromuscular Procedures
│ ├── 95867 Needle electromyography; cranial nerve supplied muscle(s), unilateral (Global: 000)
│ ├── 95868 Needle electromyography; cranial nerve supplied muscle(s), bilateral (Global: 000)
│ ├── 95869 Needle electromyography; thoracic paraspinal muscles (excluding T1 or T12) (Global: 000)
│ ├── ▶▶ 95870 ◀◀ Needle electromyography; limited study of muscles in 1 extremity or non-limb (axial) muscles (unilateral or bilateral), other than thoracic paraspinal, cranial nerve supplied muscles, or sphincters ← YOU ARE HERE (Global: 000)
│ ├── 95872 Needle electromyography using single fiber electrode, with quantitative measurement of jitter, blocking and/or fiber density, any/all sites of each muscle studied (Global: 000)
│ └── 95873 Electrical stimulation for guidance in conjunction with chemodenervation (Global: 000)
│
└── 95907-95913 Nerve Conduction Tests
├── 95907 Nerve conduction studies; 1-2 studies
└── 95908 Nerve conduction studies; 3-4 studies
💰 RVU & Reimbursement Profile
| Component | Value |
|---|---|
| Work RVU | 0.60 |
| Global Period | 000 |
| Bilateral Indicator | 0 — 150% payment adjustment for bilateral procedures does not apply.² |
| Assistant Surgeon | 0 — Assistant surgeon concept does not apply.² |
| Co‑Surgeon | 0 — Co-surgeon concept does not apply.² |
| Team Surgery | 0 — Team surgery concept does not apply.² |
| PC/TC Split | 1 — Professional and Technical component modifiers are applicable.² |
| Modifier -51 Exempt | No — Modifier -51 can be applied if multiple non-exempt procedures are performed.² |
| Anesthesia | None — Typically performed without general anesthesia.¹ |
Bilateral Billing Rules
🏷️ Modifier Reference
| Modifier | Name | When to Apply |
|---|---|---|
| -RT | Right Side | Append when the limited study is performed exclusively on the right extremity.³ |
| -LT | Left Side | Append when the limited study is performed exclusively on the left extremity.³ |
| -50 | Bilateral | Not applicable; the CPT descriptor includes “unilateral or bilateral” for axial muscles.¹² |
| -E1 | Upper Left Eyelid | Not applicable; needle EMG is not categorized by eyelid modifiers.¹ |
| -E2 | Lower Left Eyelid | Not applicable; needle EMG is not categorized by eyelid modifiers.¹ |
| -E3 | Upper Right Eyelid | Not applicable; needle EMG is not categorized by eyelid modifiers.¹ |
| -E4 | Lower Right Eyelid | Not applicable; needle EMG is not categorized by eyelid modifiers.¹ |
| -25 | Significant E/M | Apply to a separately identifiable E/M code billed on the same day as the procedure.¹ |
| -24 | Unrelated E/M | Not applicable; this is a diagnostic procedure, not a major surgery with a 90-day global period.² |
| -51 | Multiple Procedures | Apply if multiple distinct procedures are performed in the same session, subject to multiple procedure reduction.² |
| -59 | Distinct Service | Apply when the limited EMG is performed on a distinct anatomic site separate from other bundled tests.³ |
| -52 | Reduced Services | Apply if the study is inherently reduced or partially completed due to patient intolerance.¹ |
| -53 | Discontinued | Apply if the physician must abruptly terminate the procedure due to an immediate risk to the patient’s well-being.¹ |
| -58 | Staged | Not applicable; EMGs are not typically staged post-operative procedures.² |
| -78 | Return to OR | Not applicable; this is not an operative procedure requiring a return to the OR.² |
| -79 | Unrelated Procedure | Not applicable; this code has a 000 global period, so post-op unrelated procedure rules do not apply.² |
🩺 Common ICD‑10‑CM Pairings
Primary Diagnosis Group
| ICD‑10 | Description | HCC? | Notes |
|---|---|---|---|
| G56.01 | Carpal tunnel syndrome, right upper limb | No | Supports limited EMG testing of the right median nerve distribution.³ |
| G56.02 | Carpal tunnel syndrome, left upper limb | No | Supports limited EMG testing of the left median nerve distribution.³ |
| G57.11 | Meralgia paresthetica, right lower limb | No | Justifies limited evaluation of the lateral femoral cutaneous nerve distribution on the right.³ |
| G57.12 | Meralgia paresthetica, left lower limb | No | Justifies limited evaluation of the lateral femoral cutaneous nerve distribution on the left.³ |
| G58.9 | Mononeuropathy, unspecified | No | Used when the specific focal nerve compression site is not yet definitively diagnosed.³ |
Secondary Group
| ICD‑10 | Description | HCC? | Notes |
|---|---|---|---|
| M54.50 | Low back pain, unspecified | No | Frequently used as a presenting symptom prompting limited axial or lower limb EMG.³ |
| M54.41 | Lumbago with sciatica, right side | No | Clinically relevant for investigating radiculopathy using targeted limited extremity muscle testing.³ |
Etiology / Complication
| ICD‑10 | Description | HCC? | Notes |
|---|---|---|---|
| E11.40 | Type 2 diabetes with diabetic neuropathy | Yes | Identifies a systemic underlying cause contributing to the focal nerve or muscle damage.³ |
| E10.40 | Type 1 diabetes with diabetic neuropathy | Yes | Used when type 1 diabetes is the root etiology of the presenting neuropathic symptoms.³ |
Coding Specificity Reminder
Always code to the highest degree of anatomic specificity. For mononeuropathies like G56.01 or G57.11, the laterality (right, left, or bilateral) must exactly match the body side documented in the EMG report. Avoid unspecified codes (e.g., G56.00) unless the laterality is genuinely undocumented, which can lead to medical necessity denials under local coverage determinations.³
🏥 MS‑DRG Considerations
CPT 95870 is typically performed in an outpatient clinic or office setting. However, if performed on an inpatient basis, it does not act as an operating room (OR) procedure and generally will not affect MS-DRG assignment on its own. The inpatient stay would group into Nervous System MS-DRGs (e.g., MS-DRG 073, 074 for Cranial and Peripheral Nerve Disorders) based on the principal diagnosis. Under Medicare rules, compliance with the Local Coverage Determination (LCD) for Nerve Conduction Studies and electromyography (such as CMS LCD A56619 or A57478) is mandatory.³ The LCD dictates that 95870 must only be used when fewer than five extremity muscles are tested or non-paraspinal axial muscles are evaluated.³ Furthermore, the Medicare Physician Fee Schedule (MPFS) Lookup tool establishes that no bilateral adjustment is allowed for this code, and it strictly adheres to a 0-day global period with a PC/TC indicator of 1.²
🔧 ICD‑10‑PCS Equivalents
| PCS Code | Full Description | Modality |
|---|---|---|
| 4A103BC | Measurement of Central Nervous Electrical Activity, Percutaneous Approach | Electrical |
| 4A113BC | Measurement of Peripheral Nervous Electrical Activity, Percutaneous Approach | Electrical |
| 4A10XBC | Measurement of Central Nervous Electrical Activity, External Approach | Electrical |
| 4A11XBC | Measurement of Peripheral Nervous Electrical Activity, External Approach | Electrical |
PCS Character Analysis
| Position | Character | Value | Definition |
|---|---|---|---|
| 1 | Section | 4 | Measurement and Monitoring. The procedure measures physiological activity. |
| 2 | Body System | A | Physiological Systems. Electromyography evaluates systemic neuromuscular function. |
| 3 | Root Operation | 1 | Measurement. The objective is to determine the level of a physiological or physical function. |
| 4 | Body Part | 1 | Peripheral Nervous. Indicates testing of the peripheral nerves and associated muscles. |
| 5 | Approach | 3 | Percutaneous. Refers to the needle electrode being inserted through the skin. |
| 6 | Device | B | No Device. No implantable device is left inside the patient. |
| 7 | Qualifier | C | Electrical Activity. The specific physiological function being measured. |
Root Operation Comparison
The root operation for an EMG is “Measurement” because it determines a level of physiological electrical activity at a point in time.
This differs from “Monitoring,” which involves determining the level of a physiological function repetitively over a period of time (e.g., intraoperative neuromonitoring).
Proper character selection depends heavily on the approach (percutaneous for needle EMG) and the specific body system (peripheral nervous system).
📝 Coding Examples
Example 1
Clinical Scenario: A 45-year-old female presents to the neurology clinic with isolated right wrist pain and numbness in her thumb and index finger. The neurologist performs a limited needle EMG, testing three muscles (abductor pollicis brevis, flexor carpi radialis, and pronator teres) of the right upper extremity to evaluate for right carpal tunnel syndrome. No nerve conduction study (NCS) is performed. The results confirm a mild focal median neuropathy at the wrist.
| Field | Code | Rationale |
|---|---|---|
| CPT | 95870--RT | A limited study of fewer than 5 muscles in a single extremity.¹³ Modifier -RT denotes the right arm. |
| PDx | G56.01 | Carpal tunnel syndrome, right upper limb, matching the patient’s symptoms and test findings.³ |
Note
Example 2
Clinical Scenario: A 55-year-old male with left shoulder weakness undergoes a limited needle EMG in the outpatient hospital department. The physician tests four muscles of the left upper extremity. The physician is not employed by the hospital and interprets the results remotely, generating a final report. The diagnosis is unspecified mononeuropathy.
| Field | Code | Rationale |
|---|---|---|
| CPT 1 | 95870--26--LT | The physician bills for the professional component of the limited EMG on the left arm.² |
| CPT 2 | 95870--TC--LT | The outpatient hospital facility bills for the technical component (equipment and staff).² |
| PDx | G58.9 | Mononeuropathy, unspecified, capturing the diagnostic finding of the study.³ |
Warning
Ensure the physician only bills the -26 modifier, as billing the global code in a facility setting is a severe compliance violation and constitutes fraudulent double-dipping.²
Example 3
Clinical Scenario: A 60-year-old male presents with unilateral right abdominal wall weakness. To rule out a focal radiculopathy, the provider performs a limited needle EMG on the right rectus abdominis and external oblique muscles (axial, non-limb muscles). The findings are completely normal, and the patient is diagnosed with localized muscle strain.
| Field | Code | Rationale |
|---|---|---|
| CPT | 95870 | 95870 accurately captures testing of non-limb (axial) muscles.¹ No laterality modifier is needed because axial testing is included.¹² |
| PDx | M62.68 | Muscle strain, other site, corresponding to the final diagnosis of the abdominal wall.³ |
Global period reminder, if applicable
CPT 95870 carries a 000-day global period.² Therefore, subsequent visits or unrelated evaluations on future dates will not be impacted by a post-operative global package.
⚠️ Common Coding Pitfalls
- Pitfall 1: Billing 95870 when an NCS is performed on the same day. If a nerve conduction study is conducted simultaneously, the limited EMG must be coded with the add-on code 95885 instead of the standalone 95870.¹³
- Pitfall 2: Upcoding to the comprehensive code 95860. Providers must explicitly document testing of at least five muscles innervated by three or more nerves or four or more spinal levels to bill 95860; otherwise, 95870 must be used.¹³
- Pitfall 3: Using 95870 for thoracic paraspinal muscles. The descriptor of 95870 explicitly excludes thoracic paraspinals.¹ You must use 95869 for testing these specific back muscles.¹
- Pitfall 4: Appending modifier -50 for bilateral axial muscle testing. The CPT descriptor explicitly accounts for “unilateral or bilateral” testing of non-limb muscles, making bilateral billing adjustments invalid.¹²
- Pitfall 5: Failing to append modifier -26 in a facility setting. If the physician performs the interpretation in a hospital or ASC, billing the global code without -26 will result in improper overpayment.²
- Pitfall 6: Omitting the names of the specific muscles tested. Audit standards require the clinical note to list each individual muscle tested; generic statements like “arm muscles tested” will result in a denial upon review.³
📎 Sources
* AAPC. CPT® Code 95870 - Electromyography Procedures - Codify by AAPC. AAPC; 2026. https://www.aapc.com/codes/cpt-codes/95870 * CMS. Article - Billing and Coding: Nerve Conduction Studies and Electromyography (A57478). CMS.gov; 2026. https://www.cms.gov/medicare-coverage-database/view/article.aspx?articleid=57478 * PayerPrice. CPT Code 95870 - Description and Fee Schedule 2026. PayerPrice; 2026. https://payerprice.com/rates/95870-CPT-fee-scheduleSources listed above correspond to superscript citations throughout this note. Verify all Medicare payment figures against your current CMS PFS Lookup tool and applicable MAC LCD prior to claim submission. Please use the latest AAPC/AHIMA Coding Books to verify each code within this note.